Famous brand and original air end is equipped with big diameter rotors hence it is of low rotate speed and high reliability&period; Multi-stages oil separation system makes air have low oil amount&period; Low speed centrifugal fanner makes cooling air amount big and noise low&period; Super cooling period design meets with the requirement under the environments of high temperature&period; There tare two cooling methods for every model compressor&colon; Air-cooled and water-cooled&period;